Journal ArticleDOI
The visual cortex as a spatial frequency analyser
Reads0
Chats0
TLDR
Unitary responses to sinusoidal gratings either moving or alternating in phase have been investigated in the optic tract, lateral geniculate body and visual cortex of the cat as a function of the spatial frequency, position of the grating with respect to the cell receptive field and grating contrast.About:
This article is published in Vision Research.The article was published on 1973-07-01. It has received 658 citations till now. The article focuses on the topics: Binocular neurons & Receptive field.read more
Citations
More filters
Journal ArticleDOI
Uncertainty relation for resolution in space, spatial frequency, and orientation optimized by two-dimensional visual cortical filters.
TL;DR: Evidence is presented that the 2D receptive-field profiles of simple cells in mammalian visual cortex are well described by members of this optimal 2D filter family, and thus such visual neurons could be said to optimize the general uncertainty relations for joint 2D-spatial-2D-spectral information resolution.
Journal ArticleDOI
Linear Systems Analysis of Functional Magnetic Resonance Imaging in Human V1
TL;DR: Results from three empirical tests support the hypothesis that fMRI responses in human primary visual cortex (V1) depend separably on stimulus timing and stimulus contrast, and the noise in the fMRI data is independent of stimulus contrast and temporal period.
Journal ArticleDOI
Fast Feature Pyramids for Object Detection
TL;DR: For a broad family of features, this work finds that features computed at octave-spaced scale intervals are sufficient to approximate features on a finely-sampled pyramid, and this approximation yields considerable speedups with negligible loss in detection accuracy.
Journal ArticleDOI
Normalization of cell responses in cat striate cortex
TL;DR: A modified version of the linear/energy model is presented in which striate cells mutually inhibit one another, effectively normalizing their responses with respect to stimulus contrast, and shows that the new model explains a significantly larger body of physiological data.
Journal ArticleDOI
An evaluation of the two-dimensional Gabor filter model of simple receptive fields in cat striate cortex
J. P. Jones,L. A. Palmer +1 more
TL;DR: It seems that an optimal strategy has evolved for sampling images simultaneously in the 2D spatial and spatial frequency domains and the Gabor function provides a useful and reasonably accurate description of most spatial aspects of simple receptive fields.
References
More filters
Journal ArticleDOI
Receptive fields, binocular interaction and functional architecture in the cat's visual cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: This method is used to examine receptive fields of a more complex type and to make additional observations on binocular interaction and this approach is necessary in order to understand the behaviour of individual cells, but it fails to deal with the problem of the relationship of one cell to its neighbours.
Journal ArticleDOI
Application of fourier analysis to the visibility of gratings
F. W. Campbell,John G. Robson +1 more
TL;DR: The contrast thresholds of a variety of grating patterns have been measured over a wide range of spatial frequencies and the results show clear patterns of uniformity in the response to grating noise.
Journal ArticleDOI
The contrast sensitivity of retinal ganglion cells of the cat.
TL;DR: Spatial summation within cat retinal receptive fields was studied by recording from optic‐tract fibres the responses of ganglion cells to grating patterns whose luminance perpendicular to the bars varied sinusoidally about the mean level.
Journal ArticleDOI
On the existence of neurones in the human visual system selectively sensitive to the orientation and size of retinal images.
Colin Blakemore,F. W. Campbell +1 more
TL;DR: In this paper, it was found that an occipital evoked potential can be elicited in the human by moving a grating pattern without changing the mean light flux entering the eye.
Journal ArticleDOI
Sustained and transient neurones in the cat's retina and lateral geniculate nucleus.
TL;DR: Cat retinal ganglion cells may be subdivided into sustained and transient response‐types by the application of a battery of simple tests based on responses to standing contrast, fine grating patterns, size and speed of contrasting targets, and on the presence or absence of the periphery effect.
Related Papers (5)
Receptive fields, binocular interaction and functional architecture in the cat's visual cortex
David H. Hubel,Torsten N. Wiesel +1 more
On the existence of neurones in the human visual system selectively sensitive to the orientation and size of retinal images.
Colin Blakemore,F. W. Campbell +1 more